Search NASA⌕ Search

SEARCH · Search NASA

Results for “Accelerators, Instrumentation”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 901 records · Page 50
All sourcesNASA NTRSDOE OSTI
DOE OSTI2019

PROGRESS ON 140,142CE NEUTRON CROSS SECTION RESOLVED RESONANCE REGION EVALUATIONS

Oak Ridge National Laboratory is working on completing the resonance parameter evaluation of 140,142Ce in the neutron energy range up to 200 keV. Performed with the support of the US Nuclear Criticality Safety Program, this evaluation aims to generate high-fidelity cerium cross-section and covariance data. A point-wise representation of the cross sections derived from the resonance parameters will provide improved calculations of self-shielding factors for nuclear criticality safety applications and additional evaluation support for continuous-energy radiation transport methodologies. The evaluation procedure uses the Reich Moore approximation of the R-matrix theory implemented in the SAMMY code system to fit resonance parameters to high-resolution transmission and neutron capture measurements of natCe performed in 2016 by the JRC-GEEL instrument scientists at the Geel Linear Accelerator facility as well as other experimental data sets on both natural and highly-enriched cerium samples available in the experimental library EXFOR. In the analyzed energy range this work aims to improve and extend the resolved resonance region present in the latest US nuclear data library ENDF/B-VIII.0 for 140,142Ce isotopes. This paper will present the preliminary results of the R-matrix analysis based on recently measured natCe transmission data.

Chapman, Chris↗
DOE OSTI2019

What is the DUNE experiment?

Big discoveries need big detectors, and Fermilab’s Deep Underground Neutrino Experiment is one of the biggest. Fermilab plans to shoot beams of neutrinos and antimatter neutrinos through the Earth from Chicago to western South Dakota. The DUNE experiment will study neutrino interactions in great detail, with special attention on (a) comparing the behaviors of neutrinos vs. antineutrinos, (b) looking for proton decay, and (c) searching for the neutrinos emitted by supernovae. The experiment is being built and should start operations in the mid-to-late 2020s. In this video, Fermilab’s Dr. Don Lincoln gives us the lowdown on this fascinating project.

43 PARTICLE ACCELERATORS↗
NASA NTRS1990

Prediction and reconstruction of on-orbit acceleration

As the number of acceleration sensitive experiments to be carried on each Shuttle or Space Station mission increases, the requirement for either low-g environment or for accelerometry at each experiment location also increases. Preflight planning of such experiments in the past has not always included detailed analyses of the acceleration environment at the experiment location that had a serious impact on the experiment. Careful modeling of the mission activities and their effect on the experiment in many cases would have been beneficial to these experiments. In some cases, the experiment was not comprised, but insufficient instrumentation was available onboard to directly measure accelerations at the experiment location. The type of preflight modeling available to assist in experiment design and mission integration is described, as well as the use of that tool postflight to enhance flight data when sensors are not ideally suited to experiment analysis. Examples of recent shuttle flight experiments are presented.

Bergmann, Edward↗
DOE OSTI2025

Enhancing a LArTPC with a magnetic field

This paper presents the results of the 2024 Summer Students Italian program at the Fermi National Accelerator Laboratory completed by participant Lorenzo Unich, which lasted between the 27th of July and the 29th of September. This project, which bears the same title of this paper, was supervised by Marco del Tutto, researcher at the Fermi National Accelerator Laboratory. In the first section, we introduce the instruments used throughout the project, detailing their origins and the goals of the traineeship. The second section presents the hardware work conducted, while the final section focuses on the simulations performed for the experimental apparatus. Unless otherwise cited, all pictures and graphs are original.

42 ENGINEERING↗
DOE OSTI2021

LBNL-BELLA Center Monoenergetic Photon Source Experiments

This document outlines measurements made by Idaho National Laboratory (INL) staff at the Berkeley Lab Laser Accelerator (BELLA) Center. Measurements of a mono-energetic Thomson photon beam were made with various INL instruments. The photon beam was generated by a laser-plasma accelerator system. This project is referred to by the name Laser Wake. Key Lawrence Berkeley National Laboratory (LBNL) personnel involved include Liona Fan-Chiang, Cameron Geddes, Anthony Gonsalves, Robert Jacob, Tobias Ostermayr, and Hai-En Tsai.

46 - INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AN↗
DOE OSTI2014

Near Surface Leakage Monitoring for the Verification and Accounting of Geologic Carbon Sequestration Using a Field Ready 14 C Isotopic Analyzer

Results for the development of a field ready multi-isotopic analyzer for 12 CO 2 , 13 CO 2 and 14 CO 2 and applications for carbon capture and storage (CCS) containment performance are described. A design goal of the field platform was to provide isotopic data with a high data rate, a standardized reference baseline and acceptable precision (e.g., ~ ±50 per mil D 14 CO 2 ) for detection and quantification of fossil-fuel CO 2 CCS leakage scenarios. The instrument platform was not designed to replace high precision accelerator mass spectrometry. An additional goal was to combine project scale isotopic data and associated fluxes with unique financial instruments linking CCS containment performance to a publicly traded security providing project revenue to stakeholders. While the primary goals of the project were attained additional work is needed for the instrument platform and deployment within a full scale CCS site that was not available during the project timeframe.

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
DOE OSTI2021

Gap Assessment on Sensors and Instrumentation for Advanced Reactors

The Sensor Technologies for Advanced Reactors Virtual Workshop—sponsored by the Gateway for Accelerated Innovation in Nuclear (GAIN), the Electric Power Research Institute, and the Nuclear Energy Institute—was held to exchange information on sensors and sensor technologies of interest to advanced nuclear technology developers, commercial instrument suppliers, and sensor researchers from Department of Energy (DOE) national laboratories, universities, and industry. The workshop objectives were to discuss measurement requirements and sensor needs for advanced reactor concepts, understand current national laboratory capabilities and accelerated development approaches for sensors and instrumentation, and identify gaps so as to inform applicable DOE Office of Nuclear Energy (DOE-NE) research programs. Due to the complexity of holding group discussions on individual gaps, a survey was sent to workshop participants, and personalized one-on-one feedback sessions were held to elicit additional information. Summaries of these sessions are provided in this gap assessment report.

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
DOE OSTI2014

Neutron and Photon Background Measurements at the Spallation Neutron Source Facility - Paper 67

The Spallation Neutron Source facility is a short-pulsed spallation source for condensed matter research using slow neutron scattering. Neutron beams with useful energies ranging from 0.1 meV to 10 eV are brought from a target-moderator-reflector assembly down neutron beamlines to scatter from a variety of materials under study. As of early 2014, SNS routinely provides 1.4 MW (time-averaged) proton power at around 940 MeV to a mercury spallation target at 60 Hz in sub-microsecond pulses. In nearly all cases, the pulsed nature of the neutron source is used, via time-of-flight techniques, to precisely identify the energy of each neutron detected. These neutrons are frequently of such low energy, and consequent slow velocity, that they are not detected until several additional accelerator pulses have taken place. A time-dependent background feature, commonly called the 'prompt pulse,' can contaminate the recorded data. This prompt pulse arises in part from fast and high-energy neutrons and photons produced during the various source reactions, and appears at the same apparent time as the proton pulse striking the target (that is, with negligible time-of-flight delay), often obscuring the data of interest in the individual experiment. We describe here measurements of the fast and high-energy neutron and photon background around the SNS neutron scattering instruments appearing in time with the SNS accelerator pulse structure. Our measurements to date indicate that the liquid scintillator array we have deployed can satisfactorily function in the SNS environment and provide neutron-photon discriminated time/energy spectra of background sources contribution to observed, problematic SNS scattering instrument backgrounds. We will continue measurements and analysis to provide unfolded neutron energy spectra, and through longitudinal studies correlate observed changes in those spectra to external changes at SNS. (authors)

43 PARTICLE ACCELERATORS↗
NASA NTRS2000

Microgravity Acceleration Measurement System (MAMS) Flight Configuration Verification and Status

The Microgravity Acceleration Measurement System (MAMS) is a precision spaceflight instrument designed to measure and characterize the microgravity environment existing in the US Lab Module of the International Space Station. Both vibratory and quasi-steady triaxial acceleration data are acquired and provided to an Ethernet data link. The MAMS Double Mid-Deck Locker (DMDL) EXPRESS Rack payload meets all the ISS IDD and ICD interface requirements as discussed in the paper which also presents flight configuration illustrations. The overall MAMS sensor and data acquisition performance and verification data are presented in addition to a discussion of the Command and Data Handling features implemented via the ISS, downlink and the GRC Telescience Center displays.

Wagar, William↗
NASA NTRS1981

Space experiments with particle accelerators

The purpose of space experiments with particle accelerators (SEPAC) is to carry out active and interactive experiments on and in the Earth's ionosphere and magnetosphere. It is also intended to make an initial performance test for an overall program of Spacelab/SEPAC experiments. The instruments to be used are an electron beam accelerator, magnetoplasma dynamic arcjet, and associated diagnostic equipment. The accelerators are installed on the pallet, with monitoring and diagnostic observations being made by the gas plume release, beam-monitor TV, and particle-wave measuring instruments also mounted on the pallet. Command and display systems are installed in the module. Three major classes of investigations to be performed are vehicle charge neutralization, beam plasma physics, and beam atmosphere interactions. The first two are mainly onboard plasma physics experiments to measure the effect of phenomena in the vicinity of Spacelab. The last one is concerned with atmospheric modification and is supported by other Spacelab 1 investigations as well as by ground-based, remote sensing observations.

Obayashi, T.↗
NASA NTRS1992

Cameras Would Withstand High Accelerations

Very rugged cameras with all-reflective optics proposed for use in presence of high accelerations. Optics consist of four coaxial focusing mirrors in Cassegrain configuration. Mirrors are conics or aspherics. Optics achromatic,and imaging system overall passes light from extreme ultraviolet to far infrared. Charge-coupled-device video camera, film camera, or array of photodetectors placed at focal plane. Useful as portable imagers subject to rough handling, or instrumentation cameras mounted on severely vibrating or accelerating vehicles.

Meinel, Aden B.↗